Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than seven.

A292213

Number of (unlabeled) rooted trees with n leaf nodes and without unary nodes or outdegrees larger than seven.

Terms

    a(0) =0a(1) =1a(2) =1a(3) =2a(4) =5a(5) =12a(6) =33a(7) =90a(8) =260a(9) =763a(10) =2302a(11) =7035a(12) =21854a(13) =68581a(14) =217485a(15) =695229a(16) =2238965a(17) =7255380a(18) =23643501a(19) =77426852a(20) =254678757a(21) =841028918a(22) =2787320206a(23) =9267764857a(24) =30906754731a(25) =103350631437a(26) =346465277423

External references